//处理 mixin 等 scss 预编译模板
@mixin button($back-color, $font-color) {
  cursor: pointer;
  height: 40px;
  width: 120px;
  text-align: center;
  line-height: 40px;
  font-size: 16px;
  font-weight: 500;
  border-radius: 20px;
  background: $back-color;
  color: $font-color;
}
@mixin title($margin-top, $margin-bottom) {
  margin-top: $margin-top;
  margin-bottom: $margin-bottom;
  font-size: 16px;
  font-weight: 500;
  line-height: 24px;
}
